 //防抖封装
 export function debounce(func, delay) {
     let timer = null
     return function(...args) {
         if (timer) clearTimeout(timer)
         timer = setTimeout(() => {
             func.apply(this, args)
         }, delay)
     }
 }

 //封装时间戳
 export function formatDate(date, fmt) {
     //1.获取年份
     if (/(y+)/.test(fmt)) {
         fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length));
     }
     let o = {
         'M+': date.getMonth() + 1,
         'd+': date.getDate(),
         'h+': date.getHours(),
         'm+': date.getMinutes(),
         's+': date.getSeconds()
     };
     for (let k in o) {
         if (new RegExp(`(${k})`).test(fmt)) {
             let str = o[k] + '';
             fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? str : padLeftZero(str));
         }
     }
     return fmt;
 };

 function padLeftZero(str) {
     return ('00' + str).substr(str.length);
 };